Pope John Paul II condemns attacks.
European stock markets observe silence for one minute in remembrance
New York City Mayor Rudolph Giuliani warns that death toll will be in the thousands.
President Bush calls attacks an 'act of war.'
CNN reports that two phone calls from al Qaeda members referring to attacks have been intercepted.
FAA does not allow air travel to resume at noon.
FBI takes several people in Boston and Florida into custody for questioning.
Taliban officials ask the US to not attack Afghanistan.
Morgan Stanley says the 'vast majority' of its World Trade Center employees are safe.
FAA allows planes diverted on Tuesday to finish their flights.
White House claims to have credible information that Air Force One and White House were targets.
US Attorney General John Ashcroft says there were 3-6 hijackers per plane, armed with knives and box cutters, some terrorists trained as pilots in the US, and calls investigation most massive in US history.
NATO announces it will back US military action, says 'when one member is attacked, then all members are attacked.'
Rescue workers are evacuated from World Trade Center area due to partial collapse of One Liberty Plaza, Nasdaq's new headquarters.
Relatives of United Airlines Flight 93 crash victim Jeremy Glick say he called them from the plane and said people on the flight intended to attempt to stop the hijackers.
G7 issue statement promising to support banks experiencing high withdrawal demands.
Congress holds prayer vigil in Capitol Rotunda.